Explain GPS positioning and errors
Company: Jerry.Ai
Role: Software Engineer
Category: Software Engineering Fundamentals
Difficulty: medium
Interview Round: Take-home Project
Explain how GPS works at a high level. Your answer should cover how satellites and a mobile receiver estimate location, how signal propagation time is used, why accurate clocks matter, and why location estimates can contain errors. Include examples such as satellite atomic clocks, the receiver's less accurate clock, and environmental or propagation-related sources of error.
Quick Answer: This question evaluates understanding of satellite-based positioning, time synchronization, signal propagation, and error analysis—covering how satellites and a mobile receiver estimate location and why accurate clocks influence measurements.